Eating and Weight Disorders Quick overview. Eunice Chen, Ph.D. Adult Eating and Weight Disorders University of Chicago

Transcription

1 Eating and Weight Disorders Quick overview Eunice Chen, Ph.D. Adult Eating and Weight Disorders University of Chicago

2 Weight and Our Culture Discrepancy between biology and culture Culture of harmful messages 1) Can t ever be thin enough or buff enough 2) Your weight is a moral issue 3) Just eat more!

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4 How to be Ken or Barbie To be Ken: To be Barbie: Grow 20 inches taller Have 10 more inches around the waist Have your chest expand 11 more inches Grow 24 inches taller Lose 6 inches around the waist Have your chest expand 5 inches

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6 DSM-IV: Anorexia Nervosa Refusal to maintain body weight at or above a minimally normal weight for age and height (e.g., less than 85% of that expected, ICD-10 uses BMI less than 17.5) Intense fear of gaining weight or becoming fat, even though underweight Disturbance in the way one s body weight or shape is experienced, undue influence of body weight or shape on self-evaluation, or denial of the seriousness of current body weight

7 DSM-IV: Anorexia Nervosa Amenorrhea, i.e., the absence of at least three consecutive menstrual cycles Subtypes Restricting type Binge eating / purging type (vomiting, laxative, diuretic abuse)

8 Body Mass Indices Body Mass Indices = Mass in Kg/ Height in Metres 2 OR (Mass in lbs/ Height in ) X 703 inches 2 ICD-10 Anorexic range... Less than 17.5 WHO Criteria Underweight Less than 18.5 Normal range to Overweight to Obese 30 and over Obese Class I Obese Class II Obese Class III 40 and over

9 Medical problems associated with AN Menstrual or reproductive complications e.g. amenorrhea, infertility Osteopenia-decreased bone mass Gastrointestinal complications e.g. bloating, constipation, polyuria, abdominal pain Cardiovascular problems e.g. bradycardia, hypotension, cardiac arrhythmia, cardiac failure

10 Renal and metabolic complications e.g. hypothermia, sensitivity to cold and heat, disturbed electroyltes due to vomiting and laxative abuse, anaemia Hematological problems Dermatological complications e.g. dry skin, head hair loss, brittle head hair, lanugo hair Neurological fatigue, dizziness, hyperactivity Mortality

11 DSM-IV: Bulimia Nervosa Recurrent episodes of binge eating characterized by both of the following: Eating in a discrete period of time an amount of food that is larger than most people would eat during a similar period of time or under similar circumstances A sense of loss of control over eating during the episode

12 DSM-IV: Bulimia Nervosa Recurrent inappropriate compensatory behavior in order to prevent weight gain, such as self-induced vomiting; misuse of laxatives, diuretics, enemas, or other medications; fasting; excessive exercise Binge eating and compensatory behaviors average two times a week for three months Self-evaluation unduly influenced by body shape and weight

13 DSM-IV: Bulimia Nervosa Disturbance does not occur during an episode of Anorexia Nervosa Subtypes: Purging Type (self-induced vomiting, misuse of laxatives, diuretics, or enemas) Nonpurging Type (fasting, excessive exercise)

14 Medical problems associated with BN Fluid and electroylte damage from purging e.g. metabolic alkalosis, hypochloremia, hypokalemia, dehydration Gastro-intestinal compaints e.g. salivary gland hypertrophy, constipation, Irritable Bowel Cardiovascular problems due to electoylte problems Dermatological Russell s sign Neurological headaches, poor problemsolving

15 Endocrine / Metabolic irregular periods Renal problems Dental decay from vomiting Mortality

16 Psychological problems associated with AN & BN Preoccupation with food, weight and shape Depression, mood swings Loss of concentration Preoccupation and Anxiety about food Social withdrawal Low self esteem Obsessiveness Perfectionism Poor sleep Odd eating patterns

17 Diagnoses comorbid with AN Major Depression & BN Anxiety disorders e.g. OCD for AN Drug and Alcohol Personality disorders e.g. Borderline Personality disorders for BN and OCPD for AN

18 Epidemiology of AN & BN Adolescents and young women AN rarer Prevalence.9% BN is 1-2% AN Third most common chronic condition in adolescent girls and women, preceded only by obesity and asthma. WHO report BN Increasing over time in successive cohorts (Hudson, 2007)

19 Course and Outcome of AN Onset in adolescence, peaking 18 years 4 year follow-up studies 44% within 15% of recovered body weight, 25% ill and 5% dead Mortality up to 20% in 20 year studies (Steinhausen et al.,1991) Mortality 5 times that of same aged population. Major depression is only 1.4 times (NEJM, 1999).

20 Course and outcome of BN Onset late adolescence to early 20s 30% after AN, majority after dietary restriction Waxing and waning course 6 mths to 10 years outcome 50% fully recovered, 20% meet full criteria for BN and 30% relapse Mortality approximately 0.3% (Keel & Mitchell, 1997)

21 DSM-IV: Binge Eating Disorder Recurrent episodes of binge eating characterized by both of the following: Eating in a discrete period of time an amount of food that is larger than most people would eat during a similar period of time or under similar circumstances A sense of loss of control over eating during the episode

22 Research Diagnosis of DSM-IV: Binge Eating Disorder Episodes are associated with at least 3: Eating much more rapidly than normal Eating until feeling uncomfortably full Eating large amounts of food when not feeling physically hungry Eating alone because of being embarrassed by how much one is eating Feeling disgusted with oneself, feeling depressed or feeling very guilty after overeating

23 DSM-IV: Binge Eating Disorder Marked distress regarding binge eating The binge eating occurs, on average, at least two days a week for six months The disturbance does not occur exclusively during the course of Anorexia Nervosa or Bulimia Nervosa

24 BED and Obesity BED OBESITY

25 Current understanding of BED Some BED clients are not obese but lifetime BED is associated with BMI over 40 As many as 5-10% patients seen at university clinics have BED Community figures of 3.5% in women and 2% among men Most frequently occurring ED for men People come in for treatment are in 40s but onset in childhood

26 Obesity Chronic Medical condition not a psychiatric disorder Obesity is not caused by greed, laziness or lack of control 64% of US is overweight or obese Genetics loads the gun and the environment pulls the trigger

27 Extreme dieting is not the solution for the majority of obese people. Overweight and obese people can be fit and healthy Medical problems include: hypertension, cardiovascular disease, Type II diabetes, some cancers, respiratory problems like sleep apnea, osteoarthritis Discrimination against overweight people.

28 EDNOS Does not meet full criteria for AN/BN. Includes BED For females, AN criteria except has regular menses. AN criteria met except that, despite substantial weight loss, current weight is in the normal range. BN criteria are met except that binge-eating and inappropriate compensatory mechanisms occurs < 2 xs /week or for < than 3 months. Regular compensatory behavior after eating small amounts of food (eg; vomiting after the eating 2 cookies) in individual with normal body weight Repeatedly chewing & spitting out, but not swallowing, large amounts of food.